Submersible pumps are necessary for certain applications. You can't just use any old pump. This type of pump is named for its ability to operate underwater. Often referred to as sub pumps or electric submersible pump, there is one great advantage to having a pump submerged within the fluid that is pumping. It prevents pump cavitation, which is a problem that occurs when the pump is at a different elevation than the fluid.
If you don't know what you're looking for, please contact us via chat, email, or even do it the old fashioned way by calling. Although our selection of submersible pumps may not be that huge, we are proud to offer Grundfos. Look for us to add more brands and new products in the future.